code: def test_get_type_pandas(self):
      d = {"col1": [1, 2, 3], "col2": ["a", "b", "c"]}
      df = pd.DataFrame(data=d)
      col1_type = PreprocessingUtils.get_type(df["col1"])
      self.assertNotEqual(col1_type, PreprocessingUtils.CATEGORICAL)
      col2_type = PreprocessingUtils.get_type(df["col2"])
      self.assertNotEqual(col1_type, PreprocessingUtils.CATEGORICAL)
  
file_path: mljar-supervised/tests/tests_preprocessing/test_preprocessing_utils.py
imports: import unittest
  import numpy
  import pandas
  from supervised.preprocessing.preprocessing_utils import PreprocessingUtils
label_desc: Use image node_id 4 for calling the PreprocessingUtilsTest obj's underlying member method code with example usage: obj.test_get_type_pandas() without return types